Lock.



2 SHEBTS-$HBET l.

Patented.- Apri 26, 1910.

E. H. JONES.

LOUK.

APPLICATION} FILED MAY 10, 1909.

jfNVEA/TOR WITNESSES HNI B. H. JONES,

LOOK.

APPLICATION FILED MAY 10, 1909.

956,361. Patented Ap 1n26, 19107 2 SHEETS-SHEET 2.

W INESSES INVENTOR ANDREW a. GRAHAM c0. PuutmLy'ruoennvuzns wAsmNGwN.at.

umrnn sTA'ras Pagan-r carton.

ELLIS H. JONES, 0F STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOWNEMANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

LOCK.

Specification of Letters Patent.

Application filed May 10, 1909.

Patented Apr. 26, 1910.

Serial No. 495,031.

5 new and useful Improvements in Locks;

and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to an improvement in looks particularly adapted foruse in hotels, the object being to provide means whereby when the keyguard, which is actuated from the inside, is set to guard the key slot,no key but the guests or emergency key can be fully inserted or turnedin the lock, thus preventing the maids, and others holding pass keysfrom disturbing the guests by their efforts to retract the bolt.

With this and other ends in view my invention consists in the parts andcombinations of parts as will be more fully explained and pointed out inthe claims.

I have shown and will describe my improvement applied to a lock having asingle latch bolt adapted to be retracted by inner and outer knobs andby a pin tumbler lock, and also provided with stop work mechanism fordeadlocking the outer knob, whereby when the outer knob is deadlocked,the door can be opened from the outside only by a key, but I would haveit understood that I do not confine its application to such a look, butclaim broadly means operable from the inner side of the door forpreventing the complete insertion of a key in a cylinder or pin tumblerlook.

In the accompanying drawings, Figure 1 is a view in elevation of thelock with the removable plate removed, the hub of the thumb piece beingshown in its proper position, and the path of the key unobstructed. Fig.2 is a similar view showing the curtain moved into the path of the key.Fig. 3 is a View in section, and Figs. 4;, 5, 6 and 7 are views indetail of the several parts.

1 represents the lock case, and 2 the combined lock and latch bolt. Thisbolt is actuated in the usual manner, by inner and outer knobs, stopmechanism 3 of the usual kind, being employed for dogging the roll backst of the outer knob, and thus preventing the latch bolt from beingretracted from the outer side of the door except by the use of a key. I

5 is a cylinder or pin tumbler lock, the revolving plug 6 of which isprovided on its inner end with a cam 7, which actuates the bolt 2through the medium of the lever 8, the latter also being of the usualconstruction.

9 is the spring actuated dogging lever, normally held out of the path ofthe bolt 2 by the auxiliary bolt 10, and moved into thepath of the boltby its spring. When the door is open, and the auxiliary bolt projected,the cross head on the inner end of the stem of the auxiliary bolt restsin corn tact with the rear end of the dogging lever 9, and holds thelatter out of contact with the rear end of the head of the bolt. Whenhowever the door is closed and the auxiliary bolt is held in itsretracted position by its contact with the strike plate or keeper, the

spring connected with the dogging lever moves the latter to its positionin rear of the bolt and thus dogs the latter, hence when the outer knobis deadlocked by the stop mechanism, the bolt can be retracted from theoutside only by the use of key mechanism acting 011 the lever 8.

The parts thus far described are old and in general use.

In hotel locks of this kind the lock may be opened by the guests key,maids key, master key and emergency key. The guests key opens a singlelock; the maids key opens a series of looks, as for instance all thelocks on a floor the master key may operate all the locks and theemergency key all the locks.

My improvement is designed to prevent the lock when the door is closedand the outer knob deadlocked, from being actuated by any but the guestsor emergency key, and to accomplish this, I make the maids and masterkeys (and any other keys other than the guestsand emergency keys) longerthan the guests and emergency keys, so that when inserted in the plug 6of the pin tumbler lock, they project beyond the cam 7. and I providemeans, movable into the plane of the key slot in the plug, and in thepath of movement of the longer keys, thus preventing the latter frombeing pushed in sufiiciently far to actuate the look. This key blockingmechanism comprises a curtain 11 .pivoted to the lever 8, which asbefore explained is actuated by the cam 7 on the plug 6. This curtain isnormally held out of the plane of the key slot in plug 6 by the spring12, and is provided with a curved slot 13, in which a lug let integralwith or fixed to the hub 15 rests. This hub is also provided with asecond lug 16 which normally rests in the hooked end of the lever 17,which latter prevents the hub from rotating except in one direction.This hub is revolubly mounted in the disk 18 which is removably securedwithin an opening in the face plate 19 of the lock case, and is providedwith a slot 20 in which the end of the shank 21 of the thumb piece orknob 22 rests, so that when the latter is turned the hub 15 will beturned also. The slot 13 in thecurtain 11 is eccentric to the axis ofthe hub 15, so that when the hub is turned by the thumb piece 22, thelug 14, moving against the wall of the slot 20, turns the curtain 11 upto a position in rear of the key hole in the plug 6, and suflieientlyclose to the inner end thereof to prevent the complete entrance of thelonger keys, thus preventing the latter from properly registering withthe pin or other tumbler of the lock, and absolutely preventing therotation of the key. The hook lever 17 is spring pressed and lies in thepath of movement of the curtain 11, and as the latter is moved to itsposition to block the entrance of the longer keys, its

end coming in contact with the hooked end of the lever, simply forcesthe latter forwardly out of the path of the lugs on the hub. As thethumb piece is turned, and the curtain raised to its blocking position,the lug 16, which normally rests on the hook of lever 17, will be turneda half revolution until it engages the shoulder 23 on the curtain, thuslocking the latter in its position to block the entrance of the longerkeys. If a shorter key, such as the guests or emergency key beintroduced and the plug 6 turned, the cam 7 moving in contact with thebolt actuating lever 8, moves the latter on its axis, and as the curtain11 is mounted on this lever, it will be carried below the lug 16, and asit leaves the lug, its spring 12 moves it back to its normal positionagainst the shoulder 23 on the lever 8, in which position it is out ofthe path of all the keys. After the key slot has been blocked by thecurtain, any key that will retract the bolt, will also restore thecurtain to its normal position out of the path of the key. The curtainmay also be removed from the path of the key by the thumb piece 22 onthe inner side of the lock, hence it follows that after the door hasbeen unlocked from the inside and closed, as when the guest leaves theroom, the lock may be operated by any of the keys of the series. Theremovable disk 18 carrying the hub 15 is provided with lugs 24;overlapping the opposite side of the plate, but so arranged that thedisk may be removed and inserted in place, and is held or locked inposition by the screw 25, which extends out through the face plate ofthe lock.

It is evident that many slight changes might be resorted to in therelative arrangement of parts herein shown and described withoutdeparting from the spirit and scope of my invention, hence I would haveit understood that I do not wish to confine myself to the exactconstruction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. I11 a lock, the combination with a bolt, and key actuated mechanismfor actuating said bolt, the said key mechanism having a single key slottherein, of a device for blocking the passage of a key through saidslot, and means operable only from the inner side of the door for movingsaid blocking device into the path of the key slot.

2. In a lock, the combination with a bolt and key operated device foractuating the bolt, the said key operated device having but a single keyslot, of a device for blocking the passage of a key through said slot,means operable only from the inner side of the door for moving saidblocking device into its operative position, and two keys of differentlengths, the shorter one of which will actuate the lock to retract thebolt when the key slot thereof is blocked, and which also by itsretraction of the bolt restores the blocking device to its inoperativeposition.

3. In a lock the combination with a bolt and key operated device foractuating the bolt, the said key operated device having but one key slottherein, of a device for blocking the key slot, and two keys one ofwhich is adapted when the door is locked to be engaged by the saidblocking device and be prevented from operating, and the other adaptedto enter and actuate the lock.

4. In a lock the combination with a bolt and key lock for actuatingsame, the said key lock having a single key slot therein, of a blockingdevice located adjacent the end of the key slot and movable into and outof the plane of said slot, and two keys of different lengths, theshorter one of which will actuate the lock when the key slot thereof isblocked.

5. In a lock, the combination with a bolt, and a key lock. operable fromthe outside for actuating same the said key lock havin but one key slot,of a blocking device locate adjacent the inner end of said key slot andmovable into and out of the path of same, and means operable from theinner side only for moving said blocking device into the path of the keyslot.

6. In a lock, the combination with a bolt and a key lock for actuatingsame, of a blocking device located adjacent the inner end of the keyslot and movable into and out of the plane of said slot, means on theinner side of the door for moving said blocking device, and keys, one ofwhich is constructed to enter the key slot without contacting with theblocking device, whereby the lock may be unlocked by said key when thekey slot is blocked against the entrance of other keys.

7. In a lock the combination with a bolt, a lever for retracting same,and key operated devices for actuating said lever, of a curtain carriedby said lever, means for moving said curtain into the path of the keyslot, and means for locking said curtain in its blocking position.

8. In a lock the combination with a bolt, a lever for retracting sameand key operated devices for actuating said lever, of a curtain carriedby the lever and a hub for moving the curtain and for holding it in thepath of the key slot in the lock.

9. In a lock, the combination with a bolt, a lever for retracting sameand key operated devices for actuating said lever, of a curtain movablymounted on the lever, means on the inside of the door for moving thecurtain into the plane of the key slot, means for limiting the movementof said curtain moving means and means if or holding the curtain in thepath of the key slot.

10. In a lock the combination With a bolt, bolt actuating lever and keyactuated means for operating said lever, of a curtain pivoted to saidlever and provided with a slot, and a hub actuated from the inner sideof the door and having a lug resting in said slot, whereby when the hubis turned in one direction, the curtain willbe moved into the plane ofthe key slot.

11. The combination With a key lock and a lever actuated thereby, of acurtain carried by said lever and provided with a slot and a shoulder,and a hub having two lugs one which moves in the slot and the otherengages the shoulder on the curtain and holds the latter in a positionto block the key slot in the lock.

12. In a lock the combination with a bolt, a pin tumbler lock, and meanswhereby the bolt may be retracted by the pin tumbler lock, of meansoperable from the inner side only of the door and movable into the planeof the key slot in the pin tumbler lock for preventing the completeinsertion of a key in said pin tumbler lock.

In testimony whereof, I have signed this specification in the presenceof two subscribing Witnesses.

ELLIS H. JONES. WVitnesses:

W. H. TAYLOR, CHARLES E. VAIL.

